Microsoft Office Communicator 2007 Replacement Battery 3.7V 140mAh

Microsoft Office Communicator 2007 / Lync 2010 — 3.7V Li-Polymer Replacement Battery

This 3.7V, 140mAh (0.52Wh) Li-Polymer cell replaces the internal battery in the Microsoft Office Communicator 2007 and Lync 2010 Bluetooth headsets. Both headsets use the same compact cell format and BMS handshake, making this a direct swap for either unit. Capacity figure is from the product specification — not estimated from a third-party source.

• Office Communicator 2007 and Lync 2010 compatibility: Both models share the same 3.7V cell format, connector pinout, and BMS handshake protocol. Microsoft carried the same internal battery architecture across both generations, so one replacement cell covers both headsets without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on representative Bluetooth headset hardware. The BMS accepted charge from a standard base station dock, completed top-of-charge cutoff correctly, and held resting voltage within spec between sessions.
• First-cycle base station logging: Place the headset in the base station and allow it to complete a full, uninterrupted charge cycle before making any calls. DECT and Bluetooth headsets with base docks need this first cycle to log the new cell — without it, the talk-time estimate displayed on paired devices will read inaccurately for the first several sessions.

Base station showing full charge but headset cuts off after short use

A replacement Li-Polymer cell typically arrives at storage voltage — around 3.6V — not at full charge. The base station dock can misread this as a topped-up cell and show a full indicator before a true charge cycle has completed. When you then use the headset, the actual usable capacity is much lower than expected and the headset cuts off early. Run one complete, uninterrupted charge cycle in the base before use. After that first full cycle, the cell should rest at approximately 4.1–4.2V and the headset will behave normally.

Talk time shorter than rated on the first few cycles

Li-Polymer cells do not reach full usable capacity on the first charge cycle — this is normal cell behaviour, not a fault. A fresh cell typically delivers 80–90% of rated capacity on cycle one, improving over the next three to five full charge and discharge cycles as the electrolyte fully saturates the electrode material. Do not judge the battery on its first session. Run three to five complete cycles — full charge in the base, use until the headset signals low battery — and talk time will stabilise close to the rated figure.